Hello aspirant,

It is a two step process.  One needs to qualify the JEE Main exam and then take the JEE Advanced Exam.
One must have secured at least 75% marks (65% for SC/ST/PwD) in Class 12  OR One must be within the category-wise top 20 percentile in his/her respective Class XII board examination. Admissions are done on the basis of rank in JEE (Advanced) through JoSAA Counselling

Hope you understand,
Thank you

IIT Madras (IITM)

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